This page contains all the homebrews that have been done so far for Song of Swords and Tattered Realms. They are not necessarily official canon, and often consist largely of mechanics.
“Witchers use a vast array of specially brewed potions to help them overcome their prey. These...The Witcher
“These monsters are statted for use in a game. At the creation of a hydra, roll 1d10+2. This is...Homebrewed Monsters